December 8, 2010

Most of the data employed in the paper comes from the Public Use Files, National Job Corps Study, Mathematica Policy Research, Inc. (MPR). The data can be downloaded from
http://www.aeaweb.org/aer/data/dec08/20060076_data.zip 

However, a small but important portion of data was obtained from MPR under a restricted-use contract with the authors. These data are the
zip-codes of residence of individuals and the center IDs for the Job Corp centers that each sample member attended (as well as center arrival and termination dates).

For this reason, release of the full data set is not possible. If interested, a request for the restricted-use data may be directed to:

Dr. Daniel Ryan, U.S. Department of Labor (DOL)
(Dr. Ryan was the project officer for the National Job Corps Study)
The U.S. DOL would need to approve the release of this information before Mathematica would release it.


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This posting includes a description of the variables employed (for reference) in the file "Variable Documentation.xls"

In addition, the following two files contain one of the programs employed in obtaining the estimators presented in the paper. These are:
 
- The ADO file "estimators_022609.ado" that computes the estimators reported in the paper for the outcome "earnq16", both in levels and in differences.  

- The DO file "bootstrap_022609.do" that implements the bootstrap for the estimators in the ADO file above for the outcome "earnq16".

These files may be modified by interested readers to accommodate their own needs.


Please address any questions to:

Alfonso Flores-Lagunes
aflores@binghamton.edu
alfonso.flores.lagunes@gmail.com